The SHOCKWAVE Lineman's 3-in-1 Transmission Utility Socket provides more secure, efficient fastening in all fastening environments and orientations. The socket features a 3-in-1 square design for single sided fastening, eliminating the drop hazard of removing the socket from the adapter to change sizes. The push and twist barrel lock allows for secure, one-handed size changes, even while wearing gloves. The socket features and interior debris shield that resists interior rust and corrosion from dirt, wood chips and moisture from the jobsite.